Furnace.



U. WEDGE.

FURNACE.

APPLICATION FILED MAY 7, 1909.

939,934. Patented N019, 1909.

' angular bars 7 upon which are supported the UTLEY WEDGE, 0F ARDMORE, PENNSYLVANIJ FURNACE.

939,934,. Original application filed February 24,

Specification of Letters latent,

1909, Serial No 479,736.

Patented N 01 .9, 19409. Divided'and this application filed May 7,

4 1909. Serial No. 495,203.

To all whom it may concern:

, Be it known that I, U'tLnr lVnnon, a citizen of the United States, residing in 11rd more, Pennsylvania, have invented certain Improvements in Furnaces, (the same being a division of my application, Serial No. 479,736, filed February 24:, 1909,) of which the following is a specification.

My invention relates to that class of roasting or like furnaces which have superposed hearths, and a central shaft provided with arms carrying stirring and feeding blades or rabbles disposed in the different working chambers, the ore or other material to be treated (hereinafter, for convenience refiured to as ore being fed into the furnace at the top and, after being properly treated in its passage through the furnace, being discharged from the bottom.

The objects of my invention are to provide for the proper support of the refractory protecting blocks on the central shaft of the furnace, to prevent the passage of untreated or only partially treated ore from an upper to a lower working chamber, and to prevent access of air to the furnace around the lower end of the shaft. These objects I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in

. which arches of the successive working chambers and l the central hollow shaft carrying the radial arms which project. into tl working chambers and are intended to carry stirring and feeding blades or rabl'ilcs, not shown in the drawing, whereby the material delivered into the upper working chamber is caused to travel therefrom through the successive chambers below, the various chant hers being in communication with one another through passages 6. V

Secured to the outside of the shaft 4 are refractory blocks 9 whereby said shaft -is protected from the heat of the furnace, the bars I having ribs or fianges 10 upon their horizontal members which ribs or flanges are contained in grooves or recesses ing faces of the blocks 9, as shown in Fig. 1, so that while said blocks are both supported vertically upon and confined radially to the shaft 4, no part of any of the bars 7 -is exposed directly to the heat of the furnace, the burning out of said bars being thereby prevented and the necessity for their relatively frequentrenewal being overcome.

The tiles 11 which support the inner tions of the hearths 2 of the respective working chambers of the furnace are provided with vertical flanges 12 which project above the level of the hearth and thereby tend to prevent the one on any hearth of the furnace from gaining access to the annular space between the tiles 11 and the protecting blocks 9 which surround the rotating shaft 4, and certain of the latter blocks have outporwardly projecting beveled flanges 13, where-- by, if any portion of the ore upon either hearth of the furnace does find its way to the space between the tiles 11 and thepro tccting blocks 9 it wil 1,,after falling through said space, be deflected by the beveled flange in adj oin- 13 into the working chamber below, that.

from wh' fore be prevented from finding its way into the final or finishing chamber of the furnace, consequently there will be no admixture of raw or partially treated ore with the finished ore in said final chamber.

In order to prevent access of air to the working chambers around the lower end of thecenlral shaft of the furnace said shaft is provided with an annular trough letpreferably formed in one piece with the lowermost angle bar 7 which supports the refractory asing of the shaft and into this trough dips :1 depending flange 15 on the metallic deflector 12 with which the inner portion of the lowermost hearth 2 f the furnace is pro vided. v

'lhe trough 14 is normally filled with water up to a level above the bottom of the flange 15 so as to seal said flange and preventthe flow of air inwardly past the same, water being supplied to the trough inany available way, as, for instance, by the discharge pipe 16 which conveys the cooling water from the stirrer arin in the lowermost chamber of the furnace, the water, when it has reached the proper level in the trougl'i i i, escaping therefrom through one or more overflow pipes through which 1' ich it has escaped and will there-' is discharged into an annuiaixgutter 19, connnnnica'ting with a sewer pipe 20.

As an alternative construction to that just described, a trough A} may form part of the deflector 12" and may receive a flange 15 on the shaft 4:, as shown in 2.

l claim:

l. 'ihe combination oi the central, hollow rotating shaft of furnace, refraetor blocks coi'istituting a protecting casing; for

shaft, and hare on the shaft, for supporting said blocks, the horizontal portions of said bars having edge flanges contained in grooves in the clocks and protected by said blocks from the direct action. of the heat.

Zihe combination oi. the rotating enait ofa furnace, the superposed hearin and supporting tiles ii'or the inner ortions of said. hearths, said tiles having flanges projecting above the level the hearth.

3. 'ilic combination oil the lixed structure furnace having superposed working chambers. Willi a central relating shah; hm.-

"ing blocks with beveled flanges for :lall from one working chamber to an- ;ther around the shait casing.

.ihe combination of the fixed structure and the rotating central shaft of a .iurnace with an annular trough upon the lower pow ti-on of one of said niei'nbers and a flange upon the lower portion o: the other 1nenioulrardly an material which 1 her, said, flange projecting into said trough for sealing purposes, and the member which is carried by the fixed structure having in the lowermost chamber of the furnace a deflecting flange surrounding the shaft 5. The combination of the rotating shaft of a furnace, refractory blocks constituting a casing for said shaft, and a suppo: bar .t'or said blocks having formed int therewith one of the i'i'iembers of a preventing access of air to the furnace around the lower end of the shaft.

6. The combination of the central rotating shaft of a furnace, having projecting Watea cooled stirring airins a sealing trough at lower end of the furnace and a cei'inection between said sealing trough and one of the stirrer arms, whereby the waste water iii-die charged from the latter into the trough.

'7, The combination the central. rotati shaft of a furnace, having a sealing 't it ile lower end, an overflow pipe earri and rotating with said irough, and a p" into which said pipe ('lischarges.

in leeiiinony whereof, i have signe name lo this specification, in the pres ts mo subscribing witnesses.

UTLEY W 3 ijlGl l. 

